How powerfull will my PSU need to be?

aelum

Reputable
Aug 4, 2014
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4,510
I am going to use these parts to build a custom gaming PC:

Pocessor: Intel Core i7 4790
CPU Cooler: Xigmatek Loki SDS963
Motherboard: Asus Z87-A ATX LGA1150
RAM: 8GB DDR3 1333mhz (2x4GB)
Hard drive: 1TB S-ATAIII 6.0Gb/s
Opical drive: 22x DVD±RW DL S-ATA
Case: Xigmatek Asgard
Graphics Card: NVIDIA GeForce GTX 750 Ti 2GB

What sort of wattage would a PSU need to provide to power all this?(I am new to custom building computers).
Thanks in advance for any help.